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A kind of preparation method of spandex for paper diapers

A technology of diapers and spandex, which is applied in the field of polyurethane elastic fiber preparation, can solve the problems of high fiber surface friction coefficient, easy adhesion between silk and silk, and large unwinding tension, so as to reduce adhesion between fibers, reduce surface static friction coefficient, Ensure the effect of unwinding tension

Active Publication Date: 2020-07-10
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, through the addition of POSS, the technical problems such as high friction coefficient on the surface of spandex, easy adhesion between filaments, excessive unwinding tension, and easy filament breakage under the process conditions of spandex without oiling are solved.

Method used

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  • A kind of preparation method of spandex for paper diapers
  • A kind of preparation method of spandex for paper diapers
  • A kind of preparation method of spandex for paper diapers

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] (1). Preparation of POSS solution. Add POSS and organic solvent together into a glass container, first use a mechanical stirrer to mix at a high speed for 0.5-2 hours, and then use an ultrasonic vibration disperser to conduct the mixed solution for 1-3 hours to obtain a uniformly dispersed POSS solution.

[0026] (2). Preparation of mixed spinning dope. The POSS solution is added to the polyurethane urea solution, and the solution is stirred and mixed for 24-48 hours under a constant temperature of 40-60 degrees to obtain a spandex spinning stock solution.

[0027] (3). Preparation of spandex for diapers. The spinning dope is transported to the spinneret assembly, and then passes through the fine holes of the spinneret to form a dope stream; the dope stream then evaporates the organic solvent through the spinning tunnel at 240-260 degrees to become primary fibers; The twister twists and hugs into a bundle, and is drawn by the wire guide roller, and is wound by the win...

Embodiment 1

[0040] With Band-CH 2 CH 2 CF 3 1.5kg of the POSS compound of the functional group and 5.0kg of dimethylacetamide were added to the reaction tank, firstly, a mechanical stirrer was used to stir and mix at a high speed for 2 hours, and then an ultrasonic vibration disperser was used to carry out ultrasonic treatment to the mixed solution for 1 hour to obtain a concentration of 20% POSS solution. The POSS solution was added to the polyurethaneurea solution with a concentration of 35%, and the mass ratio of POSS to polyurethaneurea was 1 / 99. and stirring and mixing for 28 hours at a constant temperature of 45 degrees, and obtaining a mixed spinning dope after the maturation is completed. The spinning dope is transported to the spinneret assembly, and then passes through the spinneret pores to form a dope stream; the dope stream passes through a 260-degree spinning tunnel to evaporate the solvent to become primary fibers; 48 primary fibers are rubbed through an air false twiste...

Embodiment 2

[0042] The same experimental method as in Example 1 is adopted, except that the functional group of POSS is -CH 2 CH 2 CH(CF 3 ) 2 , the obtained spandex for diapers is recorded as sample 2.

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Abstract

The invention provides a preparation method of spandex used for paper diapers. The method includes the steps of: 1) dispersing polyhedral oligomeric silsesquioxane (POSS) in an organic solvent, and mixing the POSS solution with a polyurethane-urea solution, and aging the mixture to prepare a spandex spinning solution; 2) evaporating the spandex spinning solution to remove the organic solvent through a high-temperature course way to form initial fibers; and 3) performing false twisting, drafting and winding to obtain the spandex used for paper diapers. The method can guarantee excellent adhesion property of the spandex and is free of oiling treatment. Meanwhile, by means of the POSS, the problems that spandex is large in fiber surface friction coefficient, is not smooth in de-winding, is liable to cause adhesion and breaking in the absence of an oiling agent can be solved.

Description

technical field [0001] The invention belongs to a preparation method of polyurethane elastic fibers, in particular to a preparation method of special spandex for diapers. Background technique [0002] Diapers are generally composed of three parts: a surface covering layer, an absorbent core layer and an elastic thread. The elastic thread is the key material for the elastic waistline and side leakage protection of the diaper. Most of the elastic threads currently used are spandex fibers with excellent performance. This spandex product is called spandex for diapers. Although spandex only accounts for 2-3% of the cost of diapers, the performance of spandex directly affects the quality of diapers and the production efficiency of diapers. Generally speaking, the spandex for diapers with excellent performance should have three characteristics: suitable elasticity, smooth unwinding and good adhesion. First of all, the spandex used in diapers needs to have suitable elasticity and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/88A61L15/26
CPCA61L15/26D01F6/88C08L75/04
Inventor 许图远杨晓印梁红军王靖陈厚翔周志伟邵晓林
Owner ZHEJIANG HUAFENG SPANDEX
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